Gallien-Krueger 2001RB Bass Amp + 410SBX 400W Bass Cabinet

Lightly used studio rig. No road use.
The G-K 2001RB is the pinnacle of solid-state bass amplifiers. There is a huge power supply and four amplifiers inside of that pretty case. These include two for the low end with 540 watts each at 2 ohms (or 1080 watts bridged at 4 ohms) and 2 high-end amps with 50 watts each at 8 ohms. You can power up to 4 cabinets with this monster.
The clean G-K tone is there in spades, but this is not a one-trick pony. It can distort out for rock, play smooth for jazz and blues, and can pop like a mofo for funk.
It is rack-mountable. It measures 19 x 5.25 x 12 inches (3 rack spaces) and weighs 42lbs.
There is an input stage, two sets of channel controls, voicing filters, an EQ and an output stage. 

The input stage includes a the ¼-inch input jack, a -10dB pad switch, a pre-input clip LED, tuning mute switch and a channel select switch. 

The channel controls are set up with channel A for clean and channel B for overdrive. You will see that channel A has a Level control, while channel B gets four knobs. These include: Level, Gain, Edge (overlapping treble) and Bottom (overlapping bass). 
Tone controls include an active four-band equalizer, and two voicing filters: contour (flat to +2dB @ 50Hz,-10dB @ 500Hz, +3dB @ 7KHz) and presence (flat to +9dB @ 10KHz). There is also a 5-string bass switch that adds 10dB at 20Hz. 

The output section consists of a Boost knob, which add in the traditional Gallien-Krueger growl, as well Tweeter and Woofer volume controls. There is also a tweeter hi-cut b switch (above 10KHz) and a Woofer crossover switch (above 5KHz). 
The back of the amplifier is where you will find the four Neutrik Speakon and four 1/4" speaker output jacks, and a switch to select dual mono or bridge modes. The right side speakers have their own level control knob. There is also an adjustable direct out with a pre/post switch and a ground lift. There is also plenty of other good stuff, including an effects loop, a footswitch jack, a tuner out, remote trigger in and out, and chain in and out. The remote trigger and the chaining jacks are used if you want to connect a bunch of 2001RB amplifiers together.